In Commander, that means it can generate multiple face-down creatures every turn cycle
Dreadlight Monstrosity Dreadwurm Drinker of Sorrow Drivnod, Carnage Dominus Dross Harvester Dross Hopper Drownyard Amalgam Dunland Crebain Dusk Mangler Eater of the Dead Elder Brain Emrakul's Evangel Enslaved Horror Eternal Scourge Etherium Abomination Eviscerator Extricator of Flesh Face of Fear Faceless Butcher Faceless Devourer Fascist Art Director Fetid Gargantua Fetid Horror First-Sphere Gargantua Flesh Reaver Fleshwrither Forgotten Creation Foul Emissary Frenzied Gorespawn Frightcrawler Froghemoth Fume Spitter Gallowbraid Gamma Grotesque Geralf's Masterpiece Geralf's Mindcrusher Gisela, the Broken Blade Gleancrawler Glissa's Courier Gloom Sower Gluttonous Slug Gnarlwood Dryad Gollum, Obsessed Stalker Gollum, Patient Plotter Gollum, Scheming Guide Grakmaw, Skyclave Ravager Grasping Longneck Gravegouger Graven Abomination Gray Slaad Grazilaxx, Illithid Scholar Greater Harvester Greel, Mind Raker Grell Philosopher Grief Tyrant Grim Strider Grime Gorger Guiltfeeder Gulping Scraptrap Gurgling Anointer Havengul Skaab Hecteyes Hell's Caretaker Hidden Horror Hooded Horror Hordewing Skaab Horrid Shadowspinner Horror of the Broken Lands Horror of the Dim Hullbreaker Horror Hunted Horror Hypnox
Cards are specially selected from the Pokemon Card Game Mega Expansion Pack: Mega Brave & Mega Symphonia
Many of the best white creatures include abilities that force your opponent to play around additional costs, can swarm the board with all sorts of little creatures, and control the skies with flying creatures like angels
In other words, you have to activate or cast the ability or spell that grants regeneration at a time when you have priority, or under some condition spelled out by a static ability regenerates text
It has versatile activated abilities that provide card draw and the means to generate and enhance Thopter tokens
